312131209967 has 2 divisors, whose sum is σ = 312131209968. Its totient is φ = 312131209966.

The previous prime is 312131209913. The next prime is 312131210011. The reversal of 312131209967 is 769902131213.

It is an a-pointer prime, because the next prime (312131210011) can be obtained adding 312131209967 to its sum of digits (44).

It is a strong prime.

It is an emirp because it is prime and its reverse (769902131213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312131209967 - 2⁶ = 312131209903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312131509967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156065604983 + 156065604984.

It is an arithmetic number, because the mean of its divisors is an integer number (156065604984).

Almost surely, 2^312131209967 is an apocalyptic number.

312131209967 is a deficient number, since it is larger than the sum of its proper divisors (1).

312131209967 is an equidigital number, since it uses as much as digits as its factorization.

312131209967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 312131209967 in words is "three hundred twelve billion, one hundred thirty-one million, two hundred nine thousand, nine hundred sixty-seven".